Bug Fix Stops Internal Code Fragments From Leaking Into GitHub Issue Titles

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A recurring defect in an automated task system caused raw internal checklist and prompt scaffolding — such as fragments like '#2637/brand#16' — to appear as GitHub issue and pull request titles instead of meaningful human-readable labels. The bug originated in a function called make_issue_title within tasks/issue_title_builder.py, where boundary logic validated only that a string was present and the API call succeeded, not that the resulting title was useful to a human reviewer. Because API requests completed without errors, the failure produced no crashes or alerts, making it easy to overlook during normal development workflows. The fix restructures the boundary logic to source titles from the task's description field — the canonical human-facing label — and flags any checklist- or prompt-shaped strings as leakage even when they are technically API-valid. New assertions in tests/test_title_generation.py now detect known leakage patterns and emit warnings, ensuring internal scaffolding no longer silently passes into public-facing artifacts.

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